Les Parisiens not far from the d’Orsay on the 6e/7e border, is a steal at lunch if you get the menu. Just make sure to focus on the fish! [Non-fish items are usually less impressive.]
Le Petit Vendôme in the 2e has fantastic jambon beurre sandwiches for takeaway or to eat at the bar for a light lunch. Le complet, a sandwich with goat cheese, olive oil and jambon de pays, was also excellent; try both.
